Preheat oven to 400°F / 200°C and line a baking sheet with parchment paper.
Chop kimchi and scallions. Thinly slice onion.
In a large mixing bowl, add plain flour and wholewheat spelt flour. Whisk until combined.
Slowly drizzle in cold water and kimchi juice while whisking constantly, until just combined. Do not overmix.
Stir in chopped kimchi and scallions.
Lightly spray lined baking sheet with a little bit of cooking spray. Then, pour in the pancake batter (divide into 6 mini pancakes). Flatten the batter slightly with the back of a spoon. Spray the top lightly with cooking spray.
Bake for 20 minutes, flip, then bake for 10 more minutes or until golden and crispy.
Serve immediately with dipping sauce.